Re: [time-nuts] Reverse isolation

But not necessarily lowest noise Didier -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Sunday, March 08, 2009 8:48 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reverse

Re: [time-nuts] Reverse isolation

-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Sunday, March 08, 2009 8:48 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reverse isolation Best isolation is via a piece of fiber optics. Don Bruce Griffiths Lux, James P wrote: Actually

Re: [time-nuts] Reverse isolation

:08 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reverse isolation Didier A 10-1000mW of single mode ECDL helps. But then you need a modulator. You would also need to avoid frying any photomixer at the other end. Bruce Didier wrote

Re: [time-nuts] Reverse isolation

: [time-nuts] Reverse isolation Didier A 10-1000mW of single mode ECDL helps. But then you need a modulator. You would also need to avoid frying any photomixer at the other end. Bruce Didier wrote: But not necessarily lowest noise Didier -Original Message- From

[time-nuts] Reverse isolation

This question is directed at Bruce, but if anyone else has a contribution, feel free to speak. Bruce, What is the best way to measure the reverse isolation of an amplifier (particularly a buffer amplifier for a 10 MHz reference), when it is expected to be in the order of 100 dB or more?

Re: [time-nuts] Reverse isolation

Didier wrote: This question is directed at Bruce, but if anyone else has a contribution, feel free to speak. Bruce, What is the best way to measure the reverse isolation of an amplifier (particularly a buffer amplifier for a 10 MHz reference), when it is expected to be in the order of

Re: [time-nuts] Reverse isolation

At 06:14 PM 3/8/2009, Didier wrote... What is the best way to measure the reverse isolation of an amplifier Now I'm curious. What would forward isolation be in an amplifier? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Reverse isolation

At 06:14 PM 3/8/2009, Didier wrote: This question is directed at Bruce, but if anyone else has a contribution, feel free to speak. Bruce, What is the best way to measure the reverse isolation of an amplifier (particularly a buffer amplifier for a 10 MHz reference), when it is expected to be in

Re: [time-nuts] Reverse isolation

Didier skrev: This question is directed at Bruce, but if anyone else has a contribution, feel free to speak. Bruce, What is the best way to measure the reverse isolation of an amplifier (particularly a buffer amplifier for a 10 MHz reference), when it is expected to be in the order

Re: [time-nuts] Reverse isolation

I've been learning a little bit about this lately from my friend who is an Agilent network analyzer apps engineer. He tells me that hot S12 tests can be done with modern network analyzers. The key is being able to offset the frequencies enough so the front end of the analyzer doesn't get

Re: [time-nuts] Reverse isolation

- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of John Day Sent: Sunday, March 08, 2009 5:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reverse isolation At 06:14 PM 3/8/2009, Didier wrote: This question is directed

Re: [time-nuts] Reverse isolation

-boun...@febo.com] On Behalf Of Mike S Sent: Sunday, March 08, 2009 5:43 PM To: Discussion of precise time and frequency measurement Cc: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Reverse isolation At 06:14 PM 3/8/2009, Didier wrote... What is the best way

Re: [time-nuts] Reverse isolation

Day Sent: Sunday, March 08, 2009 5:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reverse isolation At 06:14 PM 3/8/2009, Didier wrote: This question is directed at Bruce, but if anyone else has a contribution, feel free to speak. Bruce, What

Re: [time-nuts] Reverse isolation

Didier Juges skrev: As long as one is not trying to measure extremely low signals (or extremely high isolation), the conventional method works, and I have used it many times, I am not sure that the method would scale when dealing with very high levels of isolation. I certainly would not

Re: [time-nuts] Reverse isolation

Actually, it depends on the distance from the hot carrier, the amplitude of the hot carrier and the particular VNA in question. My VNA allows me to change filters as well as integration time. And especially, where is the selectivity in the VNA's receiver? You might have a 10 Hz filter,

Re: [time-nuts] Reverse isolation

Lux, James P wrote: Actually, it depends on the distance from the hot carrier, the amplitude of the hot carrier and the particular VNA in question. My VNA allows me to change filters as well as integration time. And especially, where is the selectivity in the VNA's receiver? You might

Re: [time-nuts] Reverse isolation

Best isolation is via a piece of fiber optics. Don Bruce Griffiths Lux, James P wrote: Actually, it depends on the distance from the hot carrier, the amplitude of the hot carrier and the particular VNA in question. My VNA allows me to change filters as well as integration time. And

Re: [time-nuts] Reverse isolation

You¹re thinking that the fiber optic transmitter and receiver pair provide good reverse isolation? Maybe.. At least you could separate them by 100s of meters, so leakage isn't as big an issue. But what you gain in isolation, you might lose in other uncertainties. TANSTAAFL Jim On 3/8/09 6:47